From mmliac in hacki forum :
I have tested trunking between two 3660 with NM-16ESW and it works fine.
Connected 3 Wmware computers on each side in 2 different vlans.
Vlan information is being transferred from the VTP server to the VTP client.
I am using Vmware Workstation 5.0 and Dynamips is running on the host computer
Heres step by step configure vlan on vmware and dynamips :
Start by configuring new virtual interfaces in Vmware.